Analysis
- max time kernel
16s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20231222-en - resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system - submitted
09/01/2024, 17:10
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
4ee21362f20f5c9d7bcbaf439e1f4a34.dll
Resource
win7-20231129-en
4 signatures
150 seconds
General
- Target 4ee21362f20f5c9d7bcbaf439e1f4a34.dll
- Size 3.2MB
- Sample240109-vprhbsefck
- SHA256 5b183bcb86d9881dad0e2f0ece529860b68e9ca6a15166faae2a72faaf2a5fd8
- MD5 4ee21362f20f5c9d7bcbaf439e1f4a34
- SHA1 d0393cf57e62755390b36cc29d578fbfb31f8e79
- SHA512 6806ff0f3762a28489541155f2e70b37db820cf4fc381c649d12cfe29f405d9d6f2b11a2cb7740b14a78bb326ef06209970d4d4e781eec64cf3958f2f5125ffc
- SSDEEP 12288:dVI0W/TtlPLfJCm3WIYxJ9yK5IQ9PElOlidGAWilgm5Qq0nB6wtt4AenZ1:EfP7fWsK5z9A+WGAW+V5SB6Ct4bnb
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Signatures
-
resource yara_rule behavioral2/memory/3524-4-0x0000000007EF0000-0x0000000007EF1000-memory.dmp dridex_stager_shellcode - Executes dropped EXE 3 IoCs
pid Process 3104 EhStorAuthn.exe 224 msdt.exe 1884 psr.exe - Loads dropped DLL 4 IoCs
pid Process 3104 EhStorAuthn.exe 224 msdt.exe 1884 psr.exe 1884 psr.exe - Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Mbfbagbrjs = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Credentials\\60HdUBZhbn\\msdt.exe" Process not Found -
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA rundll32.exe Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA EhStorAuthn.exe Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA msdt.exe Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA psr.exe - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 3848 rundll32.exe 3848 rundll32.exe 3848 rundll32.exe 3848 rundll32.exe 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found 3524 Process not Found - Suspicious use of FindShellTrayWindow 2 IoCs
pid Process 3524 Process not Found 3524 Process not Found - Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 3524 wrote to memory of 1768 3524 Process not Found 76 PID 3524 wrote to memory of 1768 3524 Process not Found 76 PID 3524 wrote to memory of 3104 3524 Process not Found 81 PID 3524 wrote to memory of 3104 3524 Process not Found 81 PID 3524 wrote to memory of 4664 3524 Process not Found 77 PID 3524 wrote to memory of 4664 3524 Process not Found 77 PID 3524 wrote to memory of 224 3524 Process not Found 80 PID 3524 wrote to memory of 224 3524 Process not Found 80 PID 3524 wrote to memory of 1048 3524 Process not Found 78 PID 3524 wrote to memory of 1048 3524 Process not Found 78 PID 3524 wrote to memory of 1884 3524 Process not Found 79 PID 3524 wrote to memory of 1884 3524 Process not Found 79 - Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\4ee21362f20f5c9d7bcbaf439e1f4a34.dll,#11⤵
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
PID:3848
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C:\Windows\system32\EhStorAuthn.exeC:\Windows\system32\EhStorAuthn.exe1⤵PID:1768
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C:\Windows\system32\msdt.exeC:\Windows\system32\msdt.exe1⤵PID:4664
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C:\Windows\system32\psr.exeC:\Windows\system32\psr.exe1⤵PID:1048
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C:\Users\Admin\AppData\Local\ktmGYaA\psr.exeC:\Users\Admin\AppData\Local\ktmGYaA\psr.exe1⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks whether UAC is enabled
PID:1884
-
C:\Users\Admin\AppData\Local\lnn\msdt.exeC:\Users\Admin\AppData\Local\lnn\msdt.exe1⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks whether UAC is enabled
PID:224
-
C:\Users\Admin\AppData\Local\q4FAiGs\EhStorAuthn.exeC:\Users\Admin\AppData\Local\q4FAiGs\EhStorAuthn.exe1⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks whether UAC is enabled
PID:3104